How CSS combines selectors and declared grouping

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We can combine selector grouping and declaration grouping in a rule, and we can use fewer statements to define relatively complex styles.

The following rules specify a complex style for all headings:

H2, H3, H4, H5, H6, H7 {color:gray; background: white; padding: 10px; border: 1px solid black; font-family: Verdana;} what is csscss is a computer language used to express the file style of HTML or XML, mainly used to design the style of the web page, to make the web page more beautiful. It is also a language that defines style structures such as fonts, colors, locations, etc., and css styles can be stored directly in HTML pages or separate style sheet files, while the priority of style rules is determined by css according to this hierarchical structure, so as to achieve cascading effect. Up to now, css can not only decorate the web page, but also cooperate with various scripts to format the web page.

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